Selangor police chief Senior Deputy Comm Datuk Abdul Samah Mat said investigation into the crash would be led by the Civil Aviation Department (DCA).

"The crash site will be guarded tonight while forensics sweep the plantation for evidence. Police will form a taskforce to assist DCA. We urge any witnesses to come forward and help us find out exactly what happened," he said.

SDCP Abdul Samah said investigators faced a gruelling challenge to reach the crash site with their equipment as the helicopter had fallen in a ravine, with several slopes along the way from the main road.